EP0342153B1 - Zusatzvorrichtung zum präzisen Drehen eines Werkstücks - Google Patents

Zusatzvorrichtung zum präzisen Drehen eines Werkstücks Download PDF

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Publication number
EP0342153B1
EP0342153B1 EP89810321A EP89810321A EP0342153B1 EP 0342153 B1 EP0342153 B1 EP 0342153B1 EP 89810321 A EP89810321 A EP 89810321A EP 89810321 A EP89810321 A EP 89810321A EP 0342153 B1 EP0342153 B1 EP 0342153B1
Authority
EP
European Patent Office
Prior art keywords
cam
slide
spindle
auxiliary apparatus
set forth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89810321A
Other languages
English (en)
French (fr)
Other versions
EP0342153A1 (de
Inventor
Hans-Jürgen Leiber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kummer Freres SA
Original Assignee
Kummer Freres SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kummer Freres SA filed Critical Kummer Freres SA
Priority to AT89810321T priority Critical patent/ATE86165T1/de
Publication of EP0342153A1 publication Critical patent/EP0342153A1/de
Application granted granted Critical
Publication of EP0342153B1 publication Critical patent/EP0342153B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q33/00—Methods for copying
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q35/00—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually
    • B23Q35/04—Control systems or devices for copying directly from a pattern or a master model; Devices for use in copying manually using a feeler or the like travelling along the outline of the pattern, model or drawing; Feelers, patterns, or models therefor
    • B23Q35/08—Means for transforming movement of the feeler or the like into feed movement of tool or work
    • B23Q35/10—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only
    • B23Q35/101—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool
    • B23Q35/102—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool of one line
    • B23Q35/103—Means for transforming movement of the feeler or the like into feed movement of tool or work mechanically only with a pattern composed of one or more lines used simultaneously for one tool of one line which turns continuously
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/13—Pattern section
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/13—Pattern section
    • Y10T82/135—Cam-controlled cutter
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T82/00—Turning
    • Y10T82/14—Axial pattern

Definitions

  • the present invention relates to an auxiliary device for precision turning of a lateral surface of a workpiece fixed in a spindle of a machining machine according to the preamble of claim1.
  • drums carrying recording tapes for video devices are specially designed to allow the rational machining of parts such as drums carrying recording tapes for video devices as well as for digital cassette recorders.
  • a drum of this type is shown in fig. 1.
  • the already known devices of the kind mentioned generally give satisfaction. They allow in most cases to machine, with the required precision requirements and economically, the variable height shoulder that the outer face of the drum must present.
  • the shape of this shoulder is defined by a cam.
  • this shoulder has the shape shown in FIG. 1B, i.e. a continuous pace so that the accelerations and decelerations are of limited value, the known devices are suitable.
  • the object of the present invention is therefore to create an apparatus of the kind mentioned which makes it possible to machine, under economical conditions, parts such as those of FIGS. 1 and 1C.
  • this object is achieved by the presence, in an auxiliary device of the kind mentioned at the start, of the distinctive features of claim 1.
  • the turning machine according to fig. 2-9 comprises a headstock 2 in which is disposed a main spindle 3 equipped with a clamp 4 controlled by a pneumatic cylinder 5.
  • a bell cam 30 is mounted coaxially with the clamp 4, and integral with the latter.
  • the profile of the control surface is an exact reproduction of the shoulder profile 1 has to be machined on the workpiece 1.
  • the spindle 3 is driven by an electric motor (not shown) connected to the spindle 3 by a belt drive comprising the belt 6 and the pulley 7 secured to the spindle 3.
  • a toothed belt 9 also connects the spindle 3 to a transmitter 8 with incremental rotation, which acts as a signal transmitter for controlling the drive motor 10 of the auxiliary device.
  • the latter is generally designated by 11. It is fixed on the upper plate of a cross slide support 12 forming part of the machine. It can therefore be brought into the working position or into the rest position by displacements of the device 12.
  • the device 11 comprises a base 13 which is fixed to the upper plate of the device 12.
  • a slide 14 is guided longitudinally in base 13, preferably by hydrostatic means.
  • the oil supply for the hydrostatic support is connected to the tapped holes 22 and the oil flows through the capillary conduits 24 and the holes 23 to the suspension pockets 25.
  • This same end part of the slide 14 has two housings 15 of tool holders, in which two turning chisels 16 and 17 are fixed.
  • the slide 14 carries a second rotating roller 18, which acts as a feeler by cooperating with a second cam 20.
  • This second cam 20 is integral with a shaft 21 which is pivotally mounted by means of bearings 26, in the base 13.
  • One of the ends of this shaft is shaped as a shaft-hub coupling and connected to the drive shaft 27 an electric motor 10 also mounted on the base 13.
  • the electric motor is, in the example described, a stepping motor whose number of steps per revolution corresponds to the number of pulses emitted by the pulse generator 8 , per revolution, and whose speed of rotation is determined, by this pulse generator associated with pin 3, using a control unit.
  • the assembly is adjusted in such a way that the cam 20 rotates in exact synchronism with the main spindle 3.
  • a rotary field or direct current motor could also be used, equipped with a pulse-giving rotor, which would also drive the cam 20 in synchronism with the main spindle, by means of an appropriate control.
  • a pin 28, planted in the shaft 21 cooperates with a proximity contact 29 so as to interrupt a current at each revolution for an exactly determined angular position, of the shaft 21.
  • a reference signal which is repeated at each revolution of the cam 20.
  • the pulse generator 8 also gives, for each revolution, for a precisely determined angular position, a reference signal.
  • the slide 14 finally cooperates with support means 19, constituted by one or more springs, and it can be seen that, depending on the position of the device imposed by the cross slide device 12, it can be held in place, in the direction of its longitudinal displacement either by the roller 18 resting on the cam 20 (fig. 8) or by the roller 31 resting on the cam 30 (fig. 9).
  • the device described operates as follows: Once the coaxial holes 1b and 1c of the part 1 have been machined while this part is clamped in the clamp 4, the device 11 is immediately brought, by displacement of the device 12, into the active position of FIG. 8. The cam 30 is then ineffective and the control of the slide 14 is effected by means of the cam 20. The number of revolutions of the main spindle 3 is brought by braking to a low value while the motor 10 of the apparatus 11 rotates the cam 20 to bring it into its reference orientation. When, in this situation, the impeller donating rotor 8 passes through the orientation which gives the reference signal, the motor 10 is started and starts to rotate in synchronism of number of revolutions and angular position with spindle 3.
  • the speed rotation of the latter is then increased to the value provided for machining.
  • the motor 10 follows this acceleration.
  • the device performs a sinking movement in the direction Z and the first 17 mills the outer side surface 1d of the drum 1.
  • the shoulder 1a is also outlined, because the slide 14 to which the tool 17 is fixed follows the profile of the cam 20 under the effect of the springs 19. It therefore moves axially back and forth, at each turn.
  • This machining can be carried out at high speed because the profile of the cam 20 is, as shown in FIG. 1b, continuous, therefore does not cause a sudden jump in acceleration or deceleration.
  • the accuracy of the rough of the shoulder 1a of the part 1 is sufficiently precise to be subsequently finished by turning in one pass.
  • the cam 30 is inactive, in the apparatus 11. Thus, no parasitic force capable of disturbing the circular turning of the envelope surface 1d of the part 1, is not 'exercises on the spindle bearings 3.
  • the tool 16 is in an advanced position relative to the tool 17.
  • the cam 30 is then in an active position, where it acts on the slide 14 via the roller 31 and under the action of the springs 19.
  • the final machining of the shoulder 1a and the region adjacent to the surface 1d is effected by one Recording pass by moving the cross slide in the direction X.
  • the cross slide 12 moves and returns to its starting position, which makes it possible to loosen the finished part 1 of the clamp 4.
  • the surface 1d can be machined under economical conditions, at high speed. Only the final pass for turning in the groove, for the termination of the shoulder 1 a , the duration of which is not significant, requires a reduced rotation speed.
  • the cam 30, fixed on the main spindle is not in action relative to the apparatus 11 during the machining of the surface 1d, no additional force, liable to disturb the coaxiality of the lateral surface 1d, is meanwhile exerts on the spindle bearings. In addition, there is no mechanical connection between the device 11 and the spindle 3.
  • the cross slide 12 can move without hindrance throughout its working range.
  • spindle 3 can be accelerated, to more than 6000 rpm. All of these elements contribute to the fact that the apparatus described makes it possible to machine even tape drums rationally. video devices and DAT recorders whose shoulder profiles show marked acceleration or deceleration jumps.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Turning (AREA)
  • Attitude Control For Articles On Conveyors (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)

Claims (8)

  1. Zusatzvorrichtung zum präzisen Drehen einer seitlichen Fläche (1a, 1d) eines in einer Spindel (3) einer Bearbeitungsmaschine befestigten Werkstückes (1) mit
       einer Befestigungsfläche (13), die dazu bestimmt ist, auf einem als Kreuzschlitten ausgebildeten Träger (12) der genannten Bearbeitungsmaschine befestigt zu werden,
       Schlittenmittel (14), welche in einer vorbestimmten Richtung in bezug auf die Befestigungsfläche beweglich sind, entgegen der Wirkung von elastischen Mitteln (19),
       Befestigungsmitteln (15) für mehrere Drehwerkzeuge (16, 17), welche einstückig mit den Schlittenmitteln sind,
       und Nocken- oder Kurvenbetätigungsmittel (20, 30), welche mindestens einen synchron mit der Spindel in Rotation versetzten Nocken oder eine Kurve umfassen, wobei die Betätigungsmittel die Verschiebungen der Werkzeuge sichern, im Verlaufe derer jedes einen Teil der genannten Fläche bearbeitet,
       dadurch gekennzeichnet, dass
       die genannten Schlittenmittel aus einem einzigen Schlitten (14) bestehen und dass
       die genannten Nockenbetätigungsmittel mehrere synchronisiert angetriebene Steuerglieder, von denen jedes eine Führungsfläche aufweist, und mehrere Uebertragungsorgane umfassen, welche auf dem genannten Schlitten (18, 13) befestigt sind, wobei jedes bestimmt ist, mit einem der Nocken zusammenzuwirken,
       und die Führungsflächen der Nocken und die Uebertragungsorgane derart angeordnet sind, dass die genannten Uebertragungsorgane durch die Verschiebungen des Kreuzschlittens nacheinander in Stützpositionen zugeführt werden können, in welchen sie auf der Führungsfläche des Nockens, welchem sie entsprechen, gegen die Wirkung der erwähnten elastischen Mittel abstützen, um die Verschiebungen der Kulisse zu betätigen.
  2. Vorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, dass die Vorwärtsbewegungen, die Positionierbewegungen und die Hebebewegungen der Werkzeuge durch die Bewegungen des Kreuzschlittens realisiert werden, auf welchem die Zusatzvorrichtung befestigt ist.
  3. Vorrichtung nach einem der Patentansprüche 1 oder 2, dadurch gekennzeichnet, dass sie zwei Nocken aufweist.
  4. Vorrichtung nach Patentanspruch 3, dadurch gekennzeichnet, dass der erste Nocken (30) mit einer Spindel (3) der Bearbeitungsmaschine verbunden ist, welche eine Befestigungsklemme (4) für das Werkstück (1) trägt und dass der zweite Nocken (20) mit einer Zusatzwelle (21) verbunden ist, welche durch die Befestigungsfläche (13) der genannten Zusatzvorrichtung getragen ist und durch einen elektrischen Antrieb (8, 10) synchron mit der Geschwindigkeit und der Winkellage der Spindel in Rotation versetzt wird.
  5. Vorrichtung nach Patentanspruch 4, dadurch gekennzeichnet, dass der erste Nocken (30) ein glockenförmiger Nocken ist, der aus einem Stück mit der Spindel der Bearbeitungsmaschine besteht und koaxial zu der genannten Spindel ist.
  6. Vorrichtung nach Patentanspruch 4, dadurch gekennzeichnet, dass der zweite Nocken (20) ein flacher Nocken ist und die Achse der Zusatzwelle (21) rechtwinklig zur Richtung der Verschiebung des Schlittens orientiert ist.
  7. Vorrichtung nach den Patentansprüchen 5 und 6, dadurch gekennzeichnet, dass die genannten Nocken einer nach dem anderen durch eine Verschiebung des Kreuz-Schlittens in Arbeitsstellung gebracht werden.
  8. Vorrichtung nach einem der vorangehenden Patentansprüche, dadurch gekennzeichnet, dass der Schlitten in der Befestigungsfläche entsprechend der genannten vorbestimmten Richtung durch eine hydrostatische Wellenlagervorrichtung (22, 23, 24, 25) geführt ist.
EP89810321A 1988-05-10 1989-04-28 Zusatzvorrichtung zum präzisen Drehen eines Werkstücks Expired - Lifetime EP0342153B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810321T ATE86165T1 (de) 1988-05-10 1989-04-28 Zusatzvorrichtung zum praezisen drehen eines werkstuecks.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1780/88 1988-05-10
CH178088 1988-05-10

Publications (2)

Publication Number Publication Date
EP0342153A1 EP0342153A1 (de) 1989-11-15
EP0342153B1 true EP0342153B1 (de) 1993-03-03

Family

ID=4218439

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810321A Expired - Lifetime EP0342153B1 (de) 1988-05-10 1989-04-28 Zusatzvorrichtung zum präzisen Drehen eines Werkstücks

Country Status (5)

Country Link
US (1) US5010793A (de)
EP (1) EP0342153B1 (de)
JP (1) JPH072281B2 (de)
AT (1) ATE86165T1 (de)
DE (1) DE68905072T2 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1302885C (zh) * 2002-01-08 2007-03-07 苏国登 摩托车镗鼓机
CN104421111A (zh) * 2013-08-28 2015-03-18 上海艾郎风电科技发展有限公司 风力发电叶片的翻转装置
CN108568458B (zh) * 2018-04-26 2019-08-06 重庆西重特种铝业有限公司 一种椭锥管拉拔工艺

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE844848C (de) * 1949-09-20 1952-07-24 Froriep G M B H Maschf Vielstahl-Drehbank zum Bearbeiten von Vielkantbloecken od. dgl. mit schwingendem Werkzeugtraeger
DE967063C (de) * 1953-04-11 1957-09-26 Caro Werk Ges M B H Verfahren und Einrichtung zur Herstellung von Gleitflaechen mit in ihrer Bewegungsrichtung periodisch aufeinanderfolgenden, hydrodynamisch wirksame Schmierkeile ergebenden Keilformen
CH521202A (fr) * 1971-09-17 1972-04-15 Meyrat & Luisoni Machine à copier
JPS50145986A (de) * 1974-05-15 1975-11-22
DE2824624C3 (de) * 1978-06-05 1981-10-15 Goetze Ag, 5093 Burscheid Drehmaschine zum Bearbeiten der Umfangsflächen von unrunden Werkstücken
DE3177264D1 (de) * 1980-12-11 1992-01-02 Matsushita Electric Industrial Co Ltd Antriebsvorrichtung fuer kopiernocken einer werkzeugmaschine.
US4552045A (en) * 1981-07-15 1985-11-12 Matsushita Electric Industrial Co., Ltd. Positioning device
JPS5822601A (ja) * 1981-07-23 1983-02-10 Matsushita Electric Ind Co Ltd リ−ド面加工装置
JPS59169753A (ja) * 1983-03-15 1984-09-25 Toshiba Corp ナライ加工装置
DE3876128D1 (de) * 1987-04-16 1993-01-07 Kummer Freres Sa Bearbeitungseinrichtung zum praezisen drehen einer mantelflaeche.
US4887500A (en) * 1987-04-27 1989-12-19 Kummer Freres Sa Fabrique De Machines Ball turner for turning lathes

Also Published As

Publication number Publication date
JPH072281B2 (ja) 1995-01-18
ATE86165T1 (de) 1993-03-15
JPH01316103A (ja) 1989-12-21
EP0342153A1 (de) 1989-11-15
US5010793A (en) 1991-04-30
DE68905072T2 (de) 1993-09-30
DE68905072D1 (de) 1993-04-08

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